Graeme Souness believes Rodri is already one of the best midfielders in Premier League history. The 27-year-old etched his name into the history books after Manchester City’s 3-1 win against Manchester United, becomingthe first player in the league’s history to have been unbeaten in 59 games across all competitions. The Spanish international’s legacy is strengthening week by week, with Rio Ferdinand recently claiming that he is already superior to his former teammate and Manchester United legend Michael Carrick. Graeme Souness says Rodri is already one of the best midfielders in Premier League…